Window ventilator



Jan. 6, 1953 w LUKASAVlcz 2,624,402

WINDOW VENTILATOR Filed Feb. 15, 1952 Fig 2 INVEN TQR. Wql/er Lu/rasav/cs 8 L QJN Patented Jan. 6, 19.53

UNITED STATES PATENT OFFICE- WINDOW VENTILATOR Walter Lukasavicz, SanFrancisco, Calif. Application February 15, 1952, Serial No. 271,720

1 Claim.

This invention relates to improvements in window ventilators.

The principal object of this invention is to provide a ventilator whichwill fit windows of ifferent widths up to the limit of its capacity.

A further object is to produce a device of this character which may bereadily attached to the sides of a window frame without the use of toolsafter the retaining screws have been once placed.

A further object is to produce a device of this character which is neatin appearance, easy to install and economical to manufacture.

A further object is to provide means whereby the tension on the web maybe readily changed to accommodate various widths of Windows.

Other objects and advantages will be apparent during the course of thefollowing description.

In the accompanying drawings forming a part of this specification and inwhich like numbers are employed to designate like parts throughout thesame.

Fig. 1 is a prospective view of my ventilator as the same will appearwhen in use;

Fig. 2 is a broken cross-sectional view taken on the line 2-2 of Fig. 1and on an enlarged scale;

Fig. 3 is a top plan view on a reduced scaled the roll holder;

Fig. 4 is a fragmentary detailed view, partly in cross section, taken onthe line 4-4 of Fig. 3.

Many persons are accustomed to opening a window at the bottom in orderto secure ventilation. This opening of the window causes objectionabledrafts and therefore it has been the practice to provide glass shieldswhich are secured to the window frames by brackets which divert theincoming air in an upward direction, thus to some extent eliminatingcross currents in the room.

These window ventilators heretofore had to be made to fit each windowand were not expansible to accommodate windows of different sizes. Also,they-required a great deal of storage space when on the store shelf, orin shipping, or when stored at home.

Applicant has therefore devised a window ventilator where a web portionis formed of a, flexible material mounted upon a spring roller so thatwhen the same is released it can be housed in a relatively small casing.

Referring to the drawings, the numerals 5 and 6 designate end, plateswhich are secured to the window frame 1 on opposite sides thereofthrough the medium of screws 8 which pass through keyhole slots 9. Thisarrangement permits the plates 2 5 and 6 to be secured to or removedfrom the window frame when desired.

The plate 6 carries a housing It in which is mounted a roller 12 havingspring I3 and a tension block l4 in the top of which is secured aflattened pin l6 through the medium of which the tension block I andspring l4 may be wound.

This construction is common in all shade rollers and needs no furtherdescription.

Secured to the roller I2 is an impervious web I1 which may be made ofany desirable material such as plastic, the free end of which hasattached thereto an angular holding strip l8 having projectionsl9 whichare adapted to enter slots 2| formed in the plate 5. A knob 22facilitates the handling of the strip 3 in pulling the web across thewindow opening.

Referring to Figs. 3 and 4, it will be noted that I have provided aslotted arm 23 which has one end fitting over the pin l6 and has itsopposite end bent downwardly and inwardly as shown in Fig. 4, theinwardly bent end 24 being in alignment with the slot 26 formed in thecasing ll. As a result, by moving the lever 23 to the dotted lineposition of Fig. 3 and lifting the lever upwardly and then rotating thesame, the tension in the spring l3 may be increased or released and thenby returning the lever to the position shown in Fig. 4 and releasing thesame, the intumed end 24 will move to the full line position in Fig. 3and become secured in the slot 26.

The result of this construction is then when the plates 5 and 6 aresecured in place and the knob 22 is grasped and moved toward theopposite side of the window opening, the web will be withdrawn from theroller and when the projections 19 are engaged in their slots 2 I, thenthe material will be held taut across the window opening so as to act asa ventilator-deflector, and that it will perform all the object aboveset forth.

It is to be understood that the form of my invention herewith shown anddescribed is to be taken as a preferred example of the same and thatvarious changes relative to the material, size, shape and arrangement ofparts may be resorted to without departing from the spirit of theinvention or the scope of the subjoined claim.

Having thus described by invention, I claim:

A window ventilator comprising a pair of tapered spaced end plates, ahousing secured to one of said plate, a spring roller rotatably securedin said housing and having spring tension means extending through saidhousing, a flexible web secured at one end of said roller, a holdingstrip Secured to the opposite end of said web, and UNITED STATES PATENTSadapted to engage the other of said plates whereby the lower edge ofsaid web will engage the sill gigf f??? 1 52 of a. window to formtherewith, together with 1,356,033 Nelson Oct 1920 said end plates, adraft deflector when said screen 5 1,313,881 Peters J ly 1931 iSextended between said plates. 2 015 993 Drake Oct 1935 WALTER LUKASAVICZ2,094,444 Bozin Sept. 28, 1937 REFERENCES CITED The following referencesare of record in the file of this patent:

